A small magnetic sensor on each exterior door tells the alarm when the door is opened. Sixteen exterior and exit doors are counted from the door schedule.

This item is not in the architectural drawings and is an estimate.

From the drawings

Magnetic door contact for exterior and exit doors.

Needed for the building: 16 each

Roughly 16 exterior and exit door openings in the door schedule.

The price is an estimate. Drawing reference: Not in the drawings. Sized from 17,204 sq ft and the occupant loads on Architectural sheet 2..